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4 years ago

20% out of 70 plants

Mathematics

2 answers:

malfutka [58]4 years ago

5 0

Answer:

Step-by-step explanation:

set it up as a proportion 20/100 = x/70

cross multiply to get 100x = 1400

divide by 100

x = 14

AVprozaik [17]4 years ago

4 0

Answer:

14 plants.

Step-by-step explanation:

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Need help with this

blagie [28]

Answer:

$-5x^2-26$

Step-by-step explanation:

$(f\:o\:g)=f(g(x))\\\\f(g(x))=-5(x^2-5)-1\\\\=-5x^2-25-1\\\\=-5x^2-26$

3 0

3 years ago

I need these answers for the photos

Jobisdone [24]

That would be -2 1/2 , 3 1/2

4 0

3 years ago

4th term of (4x-y)^9

Neko [114]

Now, let's do the same as we did for the previous one here.

$\bf (4x-y)^9\implies 
\begin{array}{llll}
term&coefficient&value\\
-----&-----&-----\\
1&+1&(4x)^9(-y)^0\\
2&+9&(4x)^8(-y)^1\\
3&+36&(4x)^7(-y)^2\\
4&+84&(4x)^6(-y)^3
\end{array}$

notice again, how did we get 84 for the 4th element's coefficient? well 36 * 7 / 3. and so on. And you can just expand it from there.

3 0

4 years ago

HELP IM IN CLASS AND I NEED IT DONE TODAY!

Nesterboy [21]

Answer:

6 0

2 years ago

Find the explicit formula for the sequence? -1,4,-16,64......

Ede4ka [16]

The explicit formula for given sequence is: $a_n = -1 . (-4)^{n-1}$

Step-by-step explanation:

Given sequence is:

-1,4,-16,64.....

We can see that there is no same difference between consecutive terms so we will find common ratio to see if it is a geometric sequence.

Here

$a_1 = -1\\a_2 = 4\\a_3 = -16\\a_4 = 64\\r = \frac{a_2}{a_1} = \frac{4}{-1} = -4\\r = \frac{a_3}{a_2} = \frac{-16}{4} = -4$

The explicit formula for geometric sequence is:

$a_n = a_1r^{n-1}$

Putting the values of r and a1

$a_n = -1 . (-4)^{n-1}$

Hence

The explicit formula for given sequence is: $a_n = -1 . (-4)^{n-1}$

Keywords: Geometric sequence, common ratio

Learn more about geometric sequence at:

#learnwithBrainly

5 0

4 years ago